If x-2-1 -2-1- and x-y-4 -2- then the value of x2-y2 - 2 isA- 34B- 17C- 36D- 18E- 20

The correct option is B 17 Rationalise to get x=3+2√(2) and y=3 2√(2) Solvex^2+y^2/2=9+8+9+8/2=34/2=17 ...

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If x=√2+1 /√2...

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If x = ( $\sqrt$ 2+1)/( $\sqrt$ 2-1), and x -- y = 4 $\sqrt$ 2, then the value of (x $^{2}$ +y $^{2}$ )/2 is

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